Vent valve

Abstract

A vent valve includes a main valve having a valve chamber provided therein with an inside annular valve seat and an outside annular valve seat, a valve body normally seated on the seats under its own weight and opened by atmospheric pressure in response to negative pressure, a water collecting groove formed outward of the outside annular valve seat, a connecting cylindrical part provided at a position deviating from an axis of the valve chamber for communicating with the valve chamber, and a communicating flow path formed along the axial direction of the valve chamber for allowing communication between the water collecting groove and an interior of the connecting cylindrical part.

What is claimed is:  
     
       1. A vent valve comprising a main valve having a valve chamber provided therein with an inside annular valve seat and an outside annular valve seat, a valve body normally seated on said seats under its own weight and opened by atmospheric pressure in response to negative pressure, a water collecting groove formed outward of said outside annular valve seat, a connecting cylindrical part provided at a position deviating from an axis of said valve chamber for communicating with said valve chamber, and a communicating flow path formed along the axial direction of said valve chamber for allowing communication between said water collecting groove and an interior of said connecting cylindrical part. 
     
     
       2. A vent valve according to claim  1 , wherein said communicating flow path is disposed past a part wherein said water collecting groove overlaps an inside diameter part of said connecting cylindrical part. 
     
     
       3. A vent valve according to claim  1 , wherein said water collecting groove is inclined downward toward said communicating flow path. 
     
     
       4. A vent valve according to claim  2 , wherein said water collecting groove is inclined downward toward said communicating flow path. 
     
     
       5. A vent valve according to claim  1 , wherein said main valve is provided with a cap freely attachable thereto or detachable therefrom, the valve body elevates in said valve chamber to open the vent valve and descends in said valve chamber to close the vent valve, and said valve body is attachable to or detachable from the vent valve while accompanying said cap when said cap is detached from the main valve. 
     
     
       6. A vent valve according to claim  2 , wherein said main valve is provided with a cap freely attachable thereto or detachable therefrom, the valve body elevates in said valve chamber to open the vent valve and descends in said valve chamber to close the vent valve, and said valve body is attachable to or detachable from the vent valve while a accompanying said cap when said cap is detached from the main valve. 
     
     
       7. A vent valve according to claim  3 , wherein said main valve is provided with a cap freely attachable thereto or detachable therefrom, the valve body elevates in said valve chamber to open the vent valve and descends in said valve chamber to close the vent valve, and said valve body is attachable to or detachable from the vent valve while accompanying said cap when said cap is detached from the main valve. 
     
     
       8. A vent valve according to claim  4 , wherein said main valve is provided with a cap freely attachable thereto or detachable therefrom, the valve body elevates in said valve chamber to open the vent valve and descends in said valve chamber to close the vent valve, and said valve body is attachable to or detachable from the vent valve while accompanying said cap when said cap is detached from the main valve. 
     
     
       9. A vent valve according to claim  5 , wherein said cap has a guide shaft, said valve body is formed with a guide hole, and said guide shaft is inserted and snap-fitted in said guide hole and engaged with said valve body when said cap is detached from said main valve. 
     
     
       10. A vent valve according to claim  6 , wherein said cap has a guide shaft, said valve body is formed with a guide hole, and said guide shaft is inserted and snap-fitted in said guide hole and engaged with said valve body when said cap is detached from said main valve. 
     
     
       11. A vent valve according to claim  7 , wherein said cap has a guide shaft, said valve body is formed with a guide hole, and said guide shaft is inserted and snap-fitted in said guide hole and engaged with said valve body when said cap is detached from said main valve. 
     
     
       12. A vent valve according to claim  8 , wherein said cap has a guide shaft, said valve body is formed with a guide hole, and said guide shaft is inserted and snap-fitted in said guide hole and engaged with said valve body when said cap is detached from said main valve. 
     
     
       13. A vent valve according to claim  5 , wherein said main valve is provided in an upper part thereof with engaging means, and said cap is inserted in the axial direction of said valve chamber and is engageable with and disengageable from said engaging means by being rotated. 
     
     
       14. A vent valve according to claim  6 , wherein said main valve is provided in an upper part thereof with engaging means, and said cap is inserted in the axial direction of said valve chamber and is engageable with and disengageable from said engaging means by being rotated. 
     
     
       15. A vent valve according to claim  7 , wherein said main valve is provided in an upper part thereof with engaging means, and said cap is inserted in the axial direction of said valve chamber and is engageable with and disengageable from said engaging means by being rotated. 
     
     
       16. A vent valve according to claim  8 , wherein said main valve is provided in an upper part thereof with engaging means, and said cap is inserted in the axial direction of said valve chamber and is engageable with and disengageable from said engaging means by being rotated. 
     
     
       17. A vent valve according to claim  9 , wherein said main valve is provided in an upper part thereof with engaging means, and said cap is inserted in the axial direction of said valve chamber and is engageable with and disengageable from said engaging means by being rotated. 
     
     
       18. A vent valve according to claim  10 , wherein said main valve is provided in an upper part thereof with engaging means, and said cap is inserted in the axial direction of said valve chamber and is engageable with and disengageable from said engaging means by being rotated. 
     
     
       19. A vent valve according to claim  11 , wherein said main valve is provided in an upper part thereof with engaging means, and said cap is inserted in the axial direction of said valve chamber and is engageable with and disengageable from said engaging means by being rotated. 
     
     
       20. A vent valve according to claim  12 , wherein said main valve is provided in an upper part thereof with engaging means, and said cap is inserted in the axial direction of said valve chamber and is engageable with and disengageable from said engaging means by being rotated. 
     
     
       21. A vent valve according to claim  13 , wherein said cap and an inner peripheral surface of said valve chamber have a sealing member including an O ring mounted therebetween. 
     
     
       22. A vent valve according to claim  14 , wherein said cap and an inner peripheral surface of said valve chamber have a sealing member including an O ring mounted therebetween. 
     
     
       23. A vent valve according to claim  15 , wherein said cap and an inner peripheral surface of said valve chamber have a sealing member including an O ring mounted therebetween. 
     
     
       24. A vent valve according to claim  16 , wherein said cap and an inner peripheral surface of said valve chamber have a sealing member including an O ring mounted therebetween. 
     
     
       25. A vent valve according to claim  17 , wherein said cap and an inner peripheral surface of said valve chamber have a sealing member including an O ring mounted therebetween. 
     
     
       26. A vent valve according to claim  18 , wherein said cap and an inner peripheral surface of said valve chamber have a sealing member including an O ring mounted therebetween. 
     
     
       27. A vent valve according to claim  19 , wherein said cap and an inner peripheral surface of said valve chamber have a sealing member including an O ring mounted therebetween. 
     
     
       28. A vent valve according to claim  20 , wherein said cap and an inner peripheral surface of said valve chamber have a sealing member including an O ring mounted therebetween.